Barbecue sauce without ketchup?

I want to make some homemade barbecue sauce. The recipe I have from my mom is based on ketchup. Because I'm making this for Passover and don't want to spend $$$ on special kosher for Passover ketchup, I'm wondering if someone has a recipe using plain tomato sauce as a base.

But the entire point of this website is to interact with people who would have made the sauce or who have specific recommendations....not to google and end up elsewhere. OP asked a specific question that people can be helpful in answering, not for a random fact.

Both of those sites are pretty simplistic, but generally the same idea of homemade ketchup. Paste, vinegar, sugar, and some seasonings if you wish (onion powder, garlic powder, and cloves are pretty standard) to taste - if you're going to use sauce instead of paste, I would simmer it for 3-5 minutes to thicken it up some.

Allrecipes.com has a nice search feature where you can exclude ingredients. It tends to include a lot of things outside the exact parameters of your search, but the first couple pages are usually relevant.

SC BBQ sauce is delicious and unfamiliar to many, but mustard is not acceptable for Passover. Don't ask - it's just one of those things. But I do believe that everyone should try it. It's great on chicken, too, if you don't eat pork.

We'll agree to disagree -- just like the rabbis. There are brands of mustard that are kosher for Passover. The problem comes from the topic of kitniot. That's the category of food that does not violate the food commandments for Passover; however, it looks like food that does violate those commandments. Some religious authorities urge people to stay away from those foods so no one observing their behavior will misinterpret their level of observance. The situation gets further complicated by the fact that the Jews of Spanish and Oriental descent eat most of the items that are kitniot for Jews of Germany/Eastern European descent.

If the OP wants to explore making a delicious mustard- based barbecue sauce, the possibility exists once he/she figures out where he/she stands on kitniot. There's no one size fits all.

Kitniyot are not acceptable for Ashkenazi Jews. Since the OP is talking about preferring not to buy KLP ketchup, one can presume that he/she knows and cares about the rules of Pesach.

If the OP, or anyone else for that matter, wants to serve pork 'cue with mustard sauce at the seder, that's their business but then they probably wouldn't be asking about how to avoid using over-priced Passover substitutes.